This Facebook is in the system like a cancer in someone's blood. Would be nice if we had a clean uninstall option instead of just a disable or force stop. The good old days where we could install and uninstall seem like they are coming to an end. There are many people out there that do not want to sync contacts,pictures,sms messages,call logs and the whole enchilada...
Here in Asia when someone buys something using their visa card they send you a text message to your smartphone notifying you that your card was used for safety which is fine and if you withdraw money from an ATM they send you a text message notifying you that you made a withdrawal from your bank account but with Facebook having access to your messages they know how much you are withdrawing and what you are buying along with which bank you use. A major invasion of privacy if you ask me.
What these manufacturers need to do is basically make a smartphone with two flash drives where one can choose which flash drive they wish to download their applications on to and they can have all the permissions they need on that flash drive while all our personal stuff on the other flash drive is safe from them accessing it. Samsung seems to be working on something similar to this idea.
Samsung KNOX-Solutions-Security | SAMSUNG